Soil conditioner for greening and tree planting in saline-alkali land by using sludge

Abstract

The invention discloses a soil conditioner for greening and tree planting in a saline-alkali land by using sludge. The main point of the technical scheme of the invention is as follows: batching the following components: sludge compressed nutrient soil, sludge carbonized soil, acidified attapulgite clay particles, acidified straw, desulfurized gypsum, humic acid, a powdery saline-alkali land water-retaining slow-release fertilizer, attapulgite clay, ferrous sulfate and water; and uniformly mixing the components under stirring, and carrying out packaging so as to obtain the soil conditioner forgreening and tree planting in the saline-alkali land by using the sludge. The soil conditioner provided by the invention has the following advantages: calcium and magnesium ions contained in the soilconditioner can replace sodium ions in a colloid of saline-alkali soil, so the content of exchangeable sodium ions in soil is reduced; the alkalinity of the soil is reduced; meanwhile, the fertilityof the soil in the saline-alkali land can be significantly improved; the contents of organic matters, calcium, magnesium, silicon, sulfur, nitrogen, phosphorus and potassium in the soil of the saline-alkali land are increased; the purpose of improving the saline-alkali land is achieved; the survival rate of greening and tree planting is improved; and the soil conditioner for greening and tree planting in the saline-alkali land by using the sludge is applicable to improvement of the saline-alkali land and greening and tree planting in the saline-alkali land.

Description

technical field [0001] The invention relates to a soil conditioner, in particular to a soil conditioner for greening and planting trees on sludge saline-alkali land. Background technique [0002] Saline-alkali land means that the salt contained in the soil affects the normal growth of crops. Plants in severe saline-alkali soil areas can hardly survive. Soluble salts reduce the ability of plants to absorb water and nutrients, relatively reduce the content of soil organic matter, seriously lack nitrogen, phosphorus, potassium and trace elements, seriously damage the soil aggregate structure, reduce air permeability, and reduce the activity of aerobic microorganisms , slow soil maturation, resulting in soil compaction. Due to salinization, the physical and chemical properties of the soil deteriorate, and the living conditions of plants deteriorate. The work of greening and tree planting in saline-alkali soil is very difficult, and the survival rate of greening and planting tre...

AI Technical Summary

Problems solved by technology

[0009] The deficiencies of the above patents are: (1) the "nutrient soil" lacks ingredients for saline-alkali resistance and pH adjustment of saline-alkali land; It can be used in ordinary "original soil greening", but not suitable for "indigenous soil greening in saline-alkali land". In the process of greening and planting trees in saline-alkali land, the survival rate of seedlings is relatively low

[0011] The disadvantages of the above-mentioned patents are: (1) a large amount of sulfur powder (20% to 35%) has been selected in the ingredients. It is a low-toxic hazardous chemical, but the sulfur dioxide produced by its steam and sulfur combustion is highly toxic to the human body, so it is not suitable for saline-alkali soil conditioners

(2) Although "bentonite" is selected in the ingredients, those skilled in the art know that the pH value of sodium-based bentonite is generally 8.5-10.2, and that of calcium-based bentonite is generally 6.9-8.5. "Bentonite" is an alkaline soil. Therefore, "bentonite" has not been acidified and modified, and it is not suitable for soil conditioners in saline-alkali land